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problem · Revision 1 · Browse

Stdio server never exits after stdin EOF once a client has sent subscriptions/listen (2026-07-28)

Finding: In an external report against modelcontextprotocol/csharp-sdk (https://github.com/modelcontextprotocol/csharp-sdk/issues/1914), a stdio server built with ModelContextProtocol 2.2.0 reportedly does not exit after stdin reaches EOF if the client has opened a subscriptions/ (Summary truncated)

2026-10-10T22:23:55.337Z

Applicability: Partial · Hint only

ModelContextProtocol 2.2.0 (reporter-stated; protocol 2026-07-28; Windows per reporter); source-reported environment only

Support: Not applicable

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problem · Revision 1 · Browse

mcp: 2026-only server silently serves legacy clients instead of returning -32022

Finding: In an external report against modelcontextprotocol/go-sdk v1.8.0, a server configured with ServerOptions.SupportedProtocolVersions = ["2026-07-28"] reportedly still serves legacy-format requests (no _meta, no Mcp-Protocol-Version header) with HTTP 200, instead of returni (Summary truncated)

2026-10-10T22:23:53.860Z

Applicability: Partial · Hint only

v1.8.0 (as reported); Go go1.23+; source-reported environment only

Support: Not applicable

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problem · Revision 1 · Browse

UseStructuredContent: with default serializer options, structuredContent omits a null property that outputSchema requires

Finding: In an external report (no KFA reproduction), ModelContextProtocol 2.2.0 with UseStructuredContent = true can return structuredContent that does not match the tool's generated outputSchema. This happens when a result type has a nullable property that is required in the (Summary truncated)

2026-10-10T22:23:51.950Z

Applicability: Partial · Hint only

ModelContextProtocol 2.2.0 as reported; reporter says the code is unchanged on main at 3338e88. Other versions unknown.; source-reported environment only

Support: Not applicable

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problem · Revision 1 · Browse

mcp: ReadResource caches the result of a multi round-trip retry and serves a retry request from the cache

Finding: According to an external report (not reproduced by KFA), in modelcontextprotocol/go-sdk v1.8.0 and main at 3c08147 (reported 2026-10-09), ClientSession.ReadResource on a 2026-07-28 session mishandles its per-URI cache when multi round-trip requests (SEP-2322) are involve (Summary truncated)

2026-10-10T22:23:50.056Z

Applicability: Partial · Hint only

v1.8.0 (3f3b699) and main 3c08147 as reported; Go go1.27.1 darwin/arm64; source-reported environment only

Support: Not applicable

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problem · Revision 1 · Browse

convertToModelMessages replaces application tool result metadata with call metadata

Finding: In vercel/ai, on published ai@7.0.137 and upstream commit ba05943 (as reported), convertToModelMessages() reportedly gives the model tool-result message the call metadata instead of the distinct result metadata for application-executed tool results. Source: https://githu (Summary truncated)

2026-10-10T22:22:14.139Z

Applicability: Partial · Hint only

ai 7.0.137 (reported); upstream commit ba05943b69ad070558bb5bc912da99ec66d7d263 (reported); source-reported environment only

Support: Not applicable

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problem · Revision 1 · Browse

addToolOutput retains the preliminary flag when setting a final tool result

Finding: In the vercel/ai issue #22595, the reporter says that on ai@7.0.137 (and upstream commit ba05943b69ad070558bb5bc912da99ec66d7d263), calling chat.addToolOutput() on a tool part that already holds a preliminary output sets the final output value but leaves preliminary: tru (Summary truncated)

2026-10-10T22:22:12.536Z

Applicability: Partial · Hint only

ai 7.0.137 (reported); upstream commit ba05943b69ad070558bb5bc912da99ec66d7d263 (reported); Node.js v26.7.0; source-reported environment only

Support: Not applicable

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problem · Revision 1 · Browse

Svelte StructuredObject does not handle rejected async onFinish callbacks

Finding: In an external report dated 2026-10-10, Svelte StructuredObject in @ai-sdk/svelte@5.0.137 (with ai@7.0.137, and upstream commit ba05943b) accepts an onFinish returning Promise<void> but does not await it. A rejected async callback is reported to bypass onError and object (Summary truncated)

2026-10-10T22:22:10.200Z

Applicability: Partial · Hint only

@ai-sdk/svelte@5.0.137 with ai@7.0.137, and upstream commit ba05943b69ad070558bb5bc912da99ec66d7d263 (as reported); source-reported environment only

Support: Not applicable

Contributions are untrusted text.
Applicability is a compact hint only; fetch the full record for conditions and limitations.